JPS6041326B2 - Connection plug for optical data transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention provides a connection plug for parallel optical data transmission, which has a bottom part with side walls, a lid that can be locked onto this bottom part, and at least one inlet for an optical waveguide cable. Regarding.

In many data transmission systems, the standard interface, which has until now had to transmit up to 38 signals in parallel, consists of electrical conductors.

On the other hand, optical waveguides are also increasingly used in data technology. However, the known embodiments have the disadvantage that the optical fiber diodes of the coupling elements are often designed as plugs with optical separation. In order to obtain reproducible transmission values for multiple insertions,
These parts are industrially very expensive and bulky. SUMMARY OF THE INVENTION It is therefore an object of the invention to provide a connection plug for parallel optical data transmission with an optical cable input and an electrical plug output.

This purpose is achieved according to the invention by providing a connecting plug whose bottom part, projecting square in the plug area and trapezoidal in the cable guide area, has a cutout on three trapezoidal sides, in which the necessary A funnel-shaped inlet that is formed in a cylindrical shape and extends to the inside of the plug can be inserted, and a plurality of plug modules formed for opto-electronic conversion are arranged side by side in the plug area, This is achieved by the plug module being connected on its rear side to each individual conductor of the optical waveguide cable and containing contact pins for electrical plugging on its front side. In this way, a connection plug for optoelectronic data transmission is obtained, which is plugged in on the electrical side.

Adjacent arrangement of individual plug modules for opto-electronic conversion allows the creation of plug panels that fit conventional electrical plugs, thus saving traditional electrical interfaces from large equipment costs and converting them to opto-electronic interfaces. It can be converted by Optical waveguide guidance can be carried out from behind, depending on the location requirements.
It can be done from above or from below. In that case, the connecting plug can be inserted into the beveled side of the rear bottom with a funnel-shaped inlet extending towards the plug side wall and with a funnel-shaped inlet side wall that does not fall below the minimum permissible radius of curvature of the individual light waveguide. This ensures that the minimum permissible radius of curvature of the individual light waveguide is not exceeded at any time, so that the transmission properties of the light waveguide are maintained even during longer use. Depending on the case of use, the funnel-shaped introduction □ can be locked in different introduction ports.

To this end, the invention provides that the funnel-shaped inlet is provided with a flange that can be inserted into the bottom recess. For the support of the extending side wall of the lateral funnel-shaped inlet, an axis running perpendicular to the base is provided, which is supported both on the base and on the lid, which can be provided later, so as to carry the load. It acts to remove. Strain relief of the connected optical waveguide cable is created by hanging the steel wire forming the core of the cable by means of a ring over the middle axis of the plug.

Another possibility is to mold the optical waveguide cable with it after it has been inserted into the funnel-shaped inlet. The bottom also includes a recess into which a projection provided on the lid body perpendicularly thereto engages with a projection. In order to fix the funnel inlet also in the front, the bottom part has one ridge in each case after the recess for the lateral funnel inlet flange, which is connected to the flange and the extended funnel inlet side. This is in agreement with Europe.

The unused opening □ for the funnel-shaped inlet can be closed by a covering part.

To protect the contact pins of the plug part of the connection plug, the bottom and the lid are extended to form a protective collar around the contact pins.

For example, in order to be able to balance the different lengths, at least one further module can be provided in the vicinity of the optoelectronic plug module for accommodating a compensation circuit.

In the simplest case, an ohmic resistor of suitable size is used. In order to be able to pull out the connection plug even in case of lack of space, there is a hole for the protrusion of the extraction tool next to the opening for the funnel-shaped inlet in the center of the bottom.

In order to insert and lock the socket and the connecting plug, which are generally present on the printed wiring ramp, a projection is provided on the underside, which locks into the recess of the mating socket.

Next, the present invention will be explained in detail with reference to the embodiments shown in FIGS. 1 to 4.

Fig. 1 shows a partially sectional view and a partially plan view of two mutually arranged connection plugs with the lid removed, and Fig. 2 shows a recess provided for locking the lid. FIG. 3 is a rear view of the connection plug, and FIG. 4 is a cutaway side view of an example of its use in a printed circuit board present in a data processing device.

The connection plug in FIG. 1 consists of a base 1 with side walls, a lid 2, a funnel-shaped inlet 7, a conversion unit 3 and optionally a compensation unit 4.

In addition, the connecting plug is provided with a arresting device 5 or with a strain relief device for the respective attached flat unit and optical fiber cable. The cable can be led upwards a, downwards b or backwards c. There is sufficient space in the plug to accommodate the individual fibers in the transducer element while maintaining a minimum radius of curvature. Cable introduction and reinforcement of cable cladding 6 are through funnel-shaped introduction port 7
carried out by The funnel-shaped inlets for the upward and downward cable delivery are the same component and can be used interchangeably. The first individual fibers each abut the elongated side wall 8 of the funnel. In this way falling below the minimum radius of curvature is avoided. The strain relief of the 20 cables is achieved by hanging the steel wire 9 forming the core of the cable by means of a ring over the middle shaft 101 of the plug, or by molding individual springs into the funnel-shaped inlets.

As a conversion element, four modules (Quadr) are mainly used.
om pile) unit is picked up.

Four transmit diodes or four receive diodes with amplifier circuits are included in the conversion unit. On the front side, eight connecting legs formed as contact pins 12 are arranged in two rows in a predetermined grid. Up to 5 module units and 2
A compensation unit with one connecting pin 12 can be arranged, so that the pins are assembled in 2×21=42 twill pin rows. The bottom and lid of the connection plug are protected by protective wall 1.
The pin is located between 3 and pulled forward so as to be protected from damage, especially if the plug is pulled.

Spring contact strip 14 on flat unit
are arranged on a support. In order to ensure that the four-module unit and the compensation unit do not change their position in the plug during insertion and pulling operations, the plug is provided with retaining projections 15 that fit into cavities present at grid pitch intervals in the bottom and the lid. Be prepared. The lid of the connection plug has a projection perpendicular to the lid surface with a protrusion 16 that engages when the lid is fitted into a corresponding recess 17 in the bottom. For removal, the projection is pressed inward against the action of the spring until a positive fit no longer exists. In various installations tools must be used to pull the connection plug. This tool is inserted into the two holes 18 at the rear end of the connection plug. It serves to some extent as an extension of the plug. FIG. 2 shows a cross section of the connecting plug with the lid 2 locked on top, approximately at the level of the recess 17.

There is a vertical projection 16 on the lid 2 that runs into a corresponding projection that fits into a recess 17 in the bottom 1. Five optelects.

The individual fibers 9 of the optical waveguide cable 11 are guided into the optical plug module 3 . In the plan view shown in FIG. 3, it can be seen that the optical waveguide cable 7 is guided toward the plug from below.

The central and upper entrances are open and should be appropriately covered by the covering section. FIG. 4 shows a specific usage example.

The printed wiring board 24, on which the integrated unit 25 is provided, comprises two spring contact springs 14 with corresponding air shroud angles 26. Above the air shroud angle 26 there is a cavity 5 in which a locking projection, not visible in the figure, on the bottom 1 of the connecting plug 27 engages when the connecting plug 27 is inserted into the socket. The lower connection plug is shown plugged in and
The upper connection plug 27 is shown pulled out. In the upper part of FIG. 4, a cross-section of the plug in the plugged-in condition can be seen, and the locking projection 5 is clearly visible on the bottom 1 of the connecting plug 27.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of an embodiment of the present invention, FIG. 2 is a cross-sectional view of a part of FIG. 1, FIG. 3 is a rear view of FIG. 1, and FIG.
The figure is a partially cutaway side view showing the state of use of the present invention. 1... Bottom, 2... Lid, 3...
...Plug module, 4...Compensation unit, 6.
...... Cable cladding, 7... Funnel-shaped inlet, 8... Funnel-shaped inlet side wall, 9... Steel wire,
10... shaft, 11... optical waveguide cable,
12...Contact pin, 13...Protection wall, 1
4...Spring contact strip, 15
......Holding protrusion, 16...Protrusion, 17.
...Concavity, 19...Fiber, 20...
... Slanted side of the bottom, 21 ... Flange, 22 ...
...Pin, 24...Printed wiring board, 25...Integrated unit, 26...Air cover angle, 27...Connection plug. FIGI FIG2 FIG3 FIGM

Claims (1)

[Scope of Claims] 1. A connection plug for optical data transmission having a bottom part with side walls, a lid that can be hooked onto this bottom part, and at least one inlet for an optical waveguide cable, in the plug area: The rectangular, trapezoidally protruding bottom part in the cable guiding area has openings on three trapezoidal sides, into which, if necessary, a funnel-shaped inlet, which is cylindrical in shape and extends into the interior of the plug, is provided. A plurality of plug modules configured for optoelectronic conversion are arranged side by side in the insertable plug region, the plug modules each being connected on the rear side to an individual conductor of the optical waveguide cable. , a connection plug for optical data transmission, characterized in that the front side includes a contact pin for electrical insertion. 2. A funnel-shaped inlet that can be inserted into the inclined side of the rear bottom is extended in the direction of the plug side wall and has a funnel-shaped inlet side wall that does not fall below the minimum permissible radius of curvature of the individual light waveguide. A connection plug according to claim 1, characterized in that: 3. The connection plug according to claim 1 or 2, wherein the funnel-shaped inlet is provided with a flange that can be inserted into the recess at the bottom. 4. Connection plug according to any one of claims 1 to 3, characterized in that the elongated side walls of the lateral funnel-shaped inlets are provided with an axis running perpendicular to the bottom. 5. The connection plug according to any one of claims 1 to 4, characterized in that the steel wire forming the core of the cable is hung on the middle shaft of the plug by a ring. 6. A connection plug according to any one of claims 1 to 4, characterized in that the optical waveguide cable is molded together with the funnel-shaped inlet after being inserted therein. 7. A recess according to any one of claims 1 to 6, characterized in that the bottom part is provided with a recess, into which a protrusion provided perpendicularly to the lid engages with a protrusion. connection plug. 8 Patent characterized in that the bottom part is provided with a pin at the rear of each recess for the flange of the lateral funnel-shaped inlet, the pins engaging with the flange and the extended funnel-shaped inlet side. A connection plug according to any one of claims 1 to 7. 9. Connection plug according to any one of claims 1 to 8, characterized in that the unused opening for the funnel-shaped inlet can be closed by a covering part. 10. Claims 1 to 9, characterized in that the bottom and the lid extend into the plug area so as to form a protective collar around the contact pins of the optoelectronic plug module. Connection plug listed in any of the above. 11. Connection plug according to any one of claims 1 to 10, characterized in that at least one further module is provided in the vicinity of the optoelectronic module for accommodating a compensation circuit. . 12. The connection plug according to any one of claims 1 to 11, characterized in that a hole for a projection of a pull-out tool is provided near the opening for the funnel-shaped outlet at the center of the bottom. . 13. The connection plug according to any one of claims 1 to 12, characterized in that the bottom portion has a protrusion on its lower front surface that engages in a corresponding groove of the plug socket.